How to downgrade the annual plan of Zoom Meeting?

[bgmahesh]

We were subscribers of the Zoom Pro plan. For a particular meeting, the number of attendees hit the max of 100 participants, so in a hurry, we upgraded our annual Pro plan to an annual Business plan. We want to downgrade back to Pro and purchase a Zoom webinar subscription.

Unable to figure out how to do it. I called the sales phone number but was on hold for over 30 minutes, I had to hangup.

[bgmahesh]

Not a single response from the Zoom support team. Did not expect this from Zoom.